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Final Remedial Plan - Geweke <br />' 2 January 1992 <br /> Page 7 of 15 <br /> hydrocarbon laden air passes through a protection filter and is <br /> drawn into the carburetion system of the engine. In the carburetion <br /> system the air-to-fuel ratio (AFR) of the mixture is adjusted <br />' properly through the use of an oxygen sensor and fuel control <br /> module (FCM) . If necessary, natural gas is added to the intake <br /> stream to maintain an optimal AFR level for complete combustion. <br />' The combustion gases are exhausted to the atmosphere through a <br /> three way catalytic converter. The catalytic converter reduces the <br /> hydrocarbon, carbon monoxide and oxides of nitrogen emissions by <br />' better than 75%, 75% and 60 respectively. <br /> A schematic representation of the vapor recovery well to be <br />' implemented as a part of the system is depicted in Figure 5. The <br /> treatment system is set up in a manner to minimize the impact on <br /> the operation of the site. Specifications of ET Vaclean 1000 and <br /> parts of the system are depicted in Appendix 1 . <br /> 1 <br /> 3 . 3 . SYSTEM TESTING <br /> Previous testing of the exhaust gases has shown that the emissions <br /> from the ET Vaclean 1000 are comparable to those of any similar <br />' catalyst-equipped internal combustion engine. The testing indicated <br /> that the destruction efficiency of purgeable organic hydrocarbons <br /> was greater than 99% . Table 1 presents the destruction efficiency <br /> and emission data obtained by analyzing intake and exhaust gas <br />' samples during a test run of the system and during an actual field <br /> performance test. <br />' In order to estimate the radius of influence of the extraction <br /> well, a performance test is conducted after the unit reaches <br /> stabilized operating parameters. This condition is expected to <br /> occur within the first month of operation. We believe that a radius <br />' of influence of greater than 15 feet will be achieved, exceeding <br /> the probable lateral extent of the contamination plume in the <br /> vadose zone. <br /> 3 . 4 . EQUIPMENT AND OPERATIONAL SAFETY <br />' The remedial action is supervised by on-site geologists/ <br /> technicians trained to perform and supervise investigations and <br /> remedial actions at hazardous waste sites as specified in the OSHA <br /> Hazardous Waste Operations and Emergency Response Standard (29 CFR <br /> 1910 . 120 (e) ) . The maintenance of the unit is performed by factory- <br /> trained GeoAudit personnel. <br /> 1 <br />